Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d23041e9c037053…

MALICIOUS

PDF

84.1 KB Created: 2021-03-21 00:55:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6482a8b930712b74ccc3b06bdfb2e590 SHA-1: 6fd6cbcf3630edb41ce646e1ea031e25543a3b27 SHA-256: 1d23041e9c037053f649c07173a99ab183d86c5ef72bfeecd3f3db6da8eaddcf
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is likely part of a phishing lure. The document body, though heavily obfuscated, suggests a context related to an 'annual report', reinforcing the phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://jacksth.ru/123?utm_term=manila+bulletin+publishing+corporation+annual+report
    • https://cdn-cms.f-static.net/uploads/4465010/normal_6033eebd0c02c.pdf
    • http://com-connexion.xyz/60586008946kvi4w.pdf
    • http://rabusasomel.22web.org/47547610074.pdf
    • https://static.s123-cdn-static.com/uploads/4501193/normal_5fde117f86ba2.pdf
    • http://tryne.xyz/editable_name_handwriting_worksheets1v93m.pdf
    • https://static.s123-cdn-static.com/uploads/4368227/normal_5fdd403f58375.pdf
    • http://milansit.space/shudra_the_rising_review642ar.pdf
    • http://mx50off.info/69552388075q8kmn.pdf
    • http://kamini33.ru/321080329259n308.pdf
    • http://damvglaz2.xyz/dd_adventurers_league_eberronhntox.pdf
    • https://cdn-cms.f-static.net/uploads/4465941/normal_5fd0ba03838e2.pdf
    • http://tortomsk.ru/54359967938fshqa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://6e8b94c7-278c-4a65-9c30-8d61c93a8f31.filesusr.com/ugd/9ff9b8_2a39f2f3b8ef409d996642770e8b0af5.pdf?index=true
    • https://uploads.strikinglycdn.com/files/7d9150c2-db09-4b9f-9f13-c40f9df04571/motorola_xpr_3500e_charger_manual.pdf
    • https://521a9f5b-5c7e-4f25-a9e4-5446fb1b1975.filesusr.com/ugd/c1a494_772c690d3b8c4f0898d04e8943a92750.pdf?index=true
    • http://gujalitez.epizy.com/dbt_therapy_for_borderline_personality.pdf
    • https://uploads.strikinglycdn.com/files/007a31bc-9b45-405f-abca-0c77cdb5f6bc/samsung_fridge_not_making_ice_on_bottom.pdf
    • https://a12a05ab-6462-4855-b086-b0a2a961d6d8.filesusr.com/ugd/2c76f4_0dc65f2ced3e464ebdc36d98755be12e.pdf?index=true
    • https://45e41439-46a4-4c97-84f0-155cfeda4cef.filesusr.com/ugd/9d7ad9_60875421a75f4493a47786b0d929bbbc.pdf?index=true
    • https://uploads.strikinglycdn.com/files/0bd9cd15-e88d-4b62-a8f6-89b610acebb8/newinelipidoxavuda.pdf
    • https://uploads.strikinglycdn.com/files/f425cc95-3883-416c-8c29-dfd07a11b93e/bunodetix.pdf
    • https://b5f169ef-6bcf-4d19-a24b-32bdc9dd7a5f.filesusr.com/ugd/2e79a6_94554aad5f7c4b0880f8ce082ed2c0fa.pdf?index=true
    • http://koferajovu.epizy.com/how_to_replace_a_poulan_chainsaw_chain.pdf
    • http://javulivaxetotes.rf.gd/negalosowabod.pdf
    • http://gesovupa.epizy.com/vupubapibu.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f40b.bin
9a895edf7cfbac99507cfc1da7a4c3fd45e326fe81755df4dd49b458532fe861		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF40B 5340 bytes
font_01_sfnt_off00010635.bin
17ee28c0884e4e2ac42b8a2490fd5c736742b414ae817c09c6af02b5cc95fcad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10635 11384 bytes
font_02_sfnt_off00012d48.bin
d1a84ba8f0e4a827a048d387db8dd5dae3538f1c7e72415b16af587a9947cdc7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12D48 16060 bytes

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